Organization and Description of Business - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021 USD ($)
Organization And Description Of Business [Line Items]
Going concern, cash and cash equivalents	$ 30,300,000
Going concern, accumulated deficit	429,000,000.0
Going concern, net loss	236,000,000.0
Going concern, net cash used in operating activities	42,000,000.0
Asset Backed Credit Agreement
Organization And Description Of Business [Line Items]
Additional increase in borrowing amount	50,000,000.0
Line of credit facility, maximum liquidity requirements during the period	12,500,000
Line of credit facility, maximum liquidity requirements at all other times	$ 15,000,000.0
Line of credit facility, covenant terms	The credit facility contains a financial covenant that requires the Company to maintain a minimum unrestricted cash balance of (a) $12.5 million during the period from February 1st through and including May 31st of each calendar year, and (b) $15.0 million at all other times thereafter.  At its election, the Company may elect to comply with an alternative financial covenant that would require the Company to maintain a minimum borrowing availability under the credit facility of $10.0 million at all times.  The Company does not anticipate electing the alternative financial covenant over the next twelve months and was in compliance with the minimum liquidity covenant as of the date these consolidated financial statements were issued.
Line of credit facility, minimum borrowing	$ 10,000,000.0